Digital Camouflage and Card Models

This is one of the cases where paper modeling has some considerable advantage in comparison to plastic modeling. This is recreation of so called digital camouflages. The digital camouflage is capable to jam not only the human visual reception, but the target acquisition as well. It adds high frequency noise to the viewer reception tract by adding some small patterns over the large ordinary camouflage patterns. They can be set of squires /pixel style camouflage/ or more complicated figures with hexagonal or irregular shape. Painting such camouflage on the model is a real challenge. But it is very easy to paint it on plain paper and then to build the model, giving only the necessary shape of the model’s parts and glue them together.

You can see the 1/32 e-build paper kit that represents the military version of DAR-27 Spector of the two seater ultra light DAR’s Scooter as border patrol aircraft in Bulgarian Air Forces service.

DAR-27 Spector in digital camouflage and Bulgarian Air Force Insignia.

And the illustration how effective the digital camouflage can be.

One more view of e-build 1/32 DAR 21 Vector 2 and DAR 27 Spector card models.

You can download the DAR 21 for free from http://www.papermodels.co.il/
The Spector will be in its place in the formation also as free card model kit.

Enjoy.

3D Models and Background Accordance

3D Models and Background Accordance

Adding 3D model to some existing background may cause problems.

Despite the some tolerances that human view system allows as perspective invariants in images perception, the mismatch of perspective properties of separate objects joint in one view can be very irritated. And vice versa – correctly set camera parameters, placement the 3D model and background projection plane produce “Just like a real thing” views.

In many cases when co planarity, perpendicularity and some similar a prior information for 3D model and background is known, usage the vanishing points, horizontal, vertical lines and the other well known perspective attributes are enough for obtaining acceptable results.

But what happens when such information is unavailable?

I believe that I found the answer in general. By using epipolar geometry and only 6 points in general position I can exactly joint the 3D object to background projection. The algorithm is simple /no fundamental matrix calculation, no homogenous equation system!/

Soon the algorithm will be available as AutoCAD plug in. There is one preliminary result:

The original picture from Stallion 51 Flight Operations

One more P-51 D added in the hangar

Just like a real thing! Enjoy.